EMC2 AX100 Series User manual

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This document describes how to replace disk modules in an
AX100-Series storage system. Topics include
◆Configuration Rules and Recommendations ....................................2
◆Handling FRUs ......................................................................................3
◆Replacing a Disk Module.....................................................................5
For greater clarity, the illustrations in this document show the storage-system
chassis independent of a cabinet or deskside mounting hardware.
AX100-Series
Replacing a Disk Module
Revision A03
November 16, 2004

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AX100-Series Replacing a Disk Module
Configuration Rules and Recommendations
Configuration Rules and Recommendations
The following rules and recommendations apply to all AX100-Series
systems.
◆If possible, all drives in an AX100-Series enclosure should have
the same speed and capacity.
◆All disks in a disk pool should have the same capacity. Since all
disks in a pool are bound to match the smallest capacity disk, you
will waste disk space if the disks do not have the same capacity.
◆All disks in a disk pool should have the same speed.
◆You cannot use disk modules in slots 0-3 as hot spares. You can
configure a hot spare in any other slot; AX100-Series enclosures
allow unused slots (with filler modules) between drives.
For additional information about disk pools and other disk
configuration topics, refer to the appropriate Planning Your
AX100-Series Storage System Configuration description on the
AX100-Series support website.

AX100-Series Replacing a Disk Module
3
Handling FRUs
Handling FRUs
This section describes the precautions that you must take and the
general procedures you must follow when removing, installing, and
storing disk drive modules or any other Field Replaceable Unit
(FRU).
Power Issues and
FRUs AX100-Series storage systems are designed to be powered up
continually. Disks and power supplies are hot repairable; that is, you
can replace faulty units while the system is running. Front bezels
should always be attached and each compartment should contain a
FRU or filler panel to ensure EMI compliance and proper air flow
over the FRUs.
You should not remove a faulty FRU until you have a replacement
available.
When you replace or install FRUs, you can inadvertently damage the
sensitive electronic circuits in the equipment by simply touching
them. Electrostatic charge that has accumulated on your body
discharges through the circuits. If the air in the work area is very dry,
running a humidifier in the work area will help decrease the risk of
ESD damage. You must follow the procedures below to prevent
damage to the equipment.
Read and understand the following instructions:
◆Provide enough room to work on the equipment. Clear the work
site of any unnecessary materials or materials that naturally build
up electrostatic charge, such as foam packaging, foam cups,
cellophane wrappers, and similar items.
◆Do not remove replacement or upgrade FRUs from their antistatic
packaging until you are ready to install them.
◆Before you service a storage system, gather together the ESD kit
and all other materials you will need . Once servicing begins,
avoid moving away from the work site; otherwise, you may build
up an electrostatic charge.
◆An ESD wristband is supplied with your storage system. To use
it, attach the clip of the ESD wristband (strap) to any bare
(unpainted) metal on the storage system; then put the wristband
around your wrist with the metal button against your skin.

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AX100-Series Replacing a Disk Module
Handling FRUs
◆Use the ESD kit when handling any FRU. If an emergency arises
and the ESD kit is not available, follow the procedures in the
Emergency Procedures (Without an ESD Kit) section.
Emergency
Procedures (Without
an ESD Kit)
In an emergency when an ESD kit is not available, use the following
procedures to reduce the possibility of an electrostatic discharge by
ensuring that your body and the subassembly are at the same
electrostatic potential.
These procedures are not a substitute for the use of an ESD kit.
Follow them only in the event of an emergency.
◆Before touching any FRU, touch a bare (unpainted) metal surface
of the cabinet or storage system.
◆Before removing any FRU from its antistatic bag, place one hand
firmly on a bare metal surface of the storage system, and at the
same time, pick up the FRU while it is still sealed in the antistatic
bag. Once you have done this, do not move around the room or
touch other furnishings, personnel, or surfaces until you have
installed the FRU.
◆When you remove a FRU from the antistatic bag, avoid touching
any electronic components and circuits on it.
◆If you must move around the room or touch other surfaces before
installing a FRU, first place the FRU back in the antistatic bag.
When you are ready again to install the FRU, repeat these
procedures.

AX100-Series Replacing a Disk Module
5
Replacing a Disk Module
Replacing a Disk Module
CAUTION
!
Disk modules are extremely sensitive electronic components.
Always handle a disk module gently, and observe the following
guidelines:
◆Whenever possible or practical, replace a disk module with
another of the same model. Refer to the AX100 support website
or contact your sales/service representative for a list of
approved disk replacements.
◆Follow the instructions in the preceding section, Handling
FRUs.
◆Disk modules are sensitive to the extreme temperatures
sometimes encountered during shipping. We recommend that
you leave new disk modules in their shipping material and
expose the package to ambient temperature for at least four
hours before attempting to use the new modules in your
system.
◆Always wear a properly attached ESD wristband when
removing or replacing a disk module.
◆When removing a disk module, pull the module partially out of
the slot, then wait 30 seconds for the drive to spin down before
removing it.
◆Place modules on a soft, antistatic surface, such as an
industry-standard antistatic foam pad or the container used to
ship the module. Never place a disk module directly on a hard
surface.
◆Never hit modules, stack modules, or allow them to tip over or
fall.
◆Avoid touching any exposed electronic components and circuits
on the disk module.
◆Do not remove a faulty disk module until you have a
replacement module (with the same or an approved part
number) or a filler module available. The part number
(PN005xxxxxx) appears on the front of the module.
You must remove the storage system’s front bezel to gain access to
the disk modules. The bezel is required for EMI compliance when the

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AX100-Series Replacing a Disk Module
Replacing a Disk Module
storage system is powered up. Remove it only to replace or add a
disk module.
Unlocking and Removing the Front Bezel
Follow these steps to remove the front bezel and gain access to the
disk modules. Refer to Figure 1.
1. Insert the bezel key that shipped with your storage system into
the bezel lock, and turn it to release the lock.
2. Press the two latch buttons on the bezel surface toward each other
to release the bezel from the cabinet.
3. Pull the bezel off the cabinet and put it on a clean, static-free
surface.
Figure 1 Unlocking and Removing the Front Bezel
Proceed to the disk module removal procedure.
EMC2937

AX100-Series Replacing a Disk Module
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Replacing a Disk Module
Removing a Disk Module
CAUTION
!
If the disk module belongs to a disk pool that has virtual disks, do
not move it to another disk slot in the storage system. This could
make the information on the virtual disk inaccessible.
To determine if it is safe to move the disk, start Navisphere Express
on the storage system, and click Manage > Disk Pools. Click the
name of the disk pool that includes the disk. If the Disk Pool -
Details page lists any virtual disks, do not move the disk.
1. Attach an ESD wristband to your wrist and the storage system
(see the precautions on Page 3).
2. If the active light that points to the disk is on steadily, pull the
latch, and slowly pull the module about 1 in (3 cm) from its slot.
Wait 30 seconds for the disk to stop spinning. Then remove the
module and place it on a padded, static-free surface.
If the active light is off or mostly off you do not need to wait for
the disk to stop spinning. Pull the latch and slowly pull the
module from its slot, as shown in Figure 2. Place it on a padded,
static-free surface.
Figure 2 Removing a Disk Module
EMC2811
Disk

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AX100-Series Replacing a Disk Module
Replacing a Disk Module
3. Place the original module in a static-free bag and return it to your
service provider.
Installing a Disk Module
CAUTION
!
Before you install a replacement disk, make certain any hot spare
configured with the original disk pool is completely reconstructed.
a. From a network-connected workstation, start Navisphere®
Express for the AX100-Series storage system by entering the
IP address in a browser window. (Refer to the release notes
on the AX100 support website for a list of supported
browsers.)
b. In the navigation pane, under Manage, click Hot Spare.
c. Verify that the Replacing field says
Data has been reconstructed to the hot spare.
d. If the hot spare is still transitioning, wait until the disk
pool has written all necessary data to the hot spare.
Follow these steps to replace a disk.
1. Make sure an ESD wristband is attached to your wrist and the
storage system (see the precautions on Page 3).
2. Align the module with the guides in the slot.
3. Gently push the module completely into the slot. To ensure that
the module seats completely, push in on the disk label as you
engage the latch. See Figure 3.

AX100-Series Replacing a Disk Module
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Replacing a Disk Module
Figure 3 Installing a Disk Module
The disk module’s Active light flashes to indicate the disk’s
spin-up sequence.
4. Use Navisphere® Express to verify that the new disk is
operational.
a. In the navigation pane, under View, click components.
b. Scan the list of components to verify that the new disk is
Normal; that is, recognized and working properly.
It may take several minutes for Navisphere Express to rebuild the
replacement disk by restoring data to it from the disk pool. Depending
on the size of the disk, how much data is on the disks, and whether I/O
is running during the rebuild, the process can take from a few minutes to
many hours.
5. Remove and store the ESD wristband and continue to the next
section to install the front bezel.
Installing and Locking the Front Bezel
Refer to Figure 4 as you do the following:
1. Align the bezel with the storage system.
EMC2812
Label
(Push Here)
Disk

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AX100-Series Replacing a Disk Module
Replacing a Disk Module
2. Gently push the bezel into place on the cabinet until it latches.
3. Secure the bezel by turning the key in the lock.
Figure 4 Installing and Locking the Front Bezel
Copyright © 2004 EMC Corporation. All Rights Reserved.
EMC believes the information in this publication is accurate as of its publication date. The information is subject to
change without notice.
THE INFORMATION IN THIS PUBLICATION IS PROVIDED "AS IS." EMC CORPORATION MAKES NO
REPRESENTATIONS OR WARRANTIES OF ANY KIND WITH RESPECT TO THE INFORMATION IN THIS
PUBLICATION, AND SPECIFICALLY DISCLAIMS IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.
Use, copying, and distribution of any EMC software described in this publication requires an applicable software
license.
Trademark Information
EMC2, EMC, CLARiiON, Navisphere, and PowerPath are registered trademarks and Access Logix, FLARE, SAN Copy, SnapView and MirrorView are
trademarks of EMC Corporation.
All other trademarks mentioned herein are the property of their respective owners.
EMC2935a